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forkhead associated (FHA) domain found in the kinesin-like protein KIF1 family The KIF1 family includes KIF1A, KIF1B, and KIF1C. KIF1A, also called axonal transporter of synaptic vesicles (ATSV), microtubule-based motor KIF1A, Unc-104- and KIF1A-related protein, or Unc-104, is an axonal transporter of synaptic vesicles, which is mutated in hereditary sensory and autonomic neuropathy type 2. It is also required for neuronal dense core vesicle (DCV) transport to dendritic spines and axons. The calcium-dependent interaction with CALM1 increases vesicle motility, and interaction with the scaffolding proteins PPFIA2 and TANC2 recruits DCVs to synaptic sites. KIF1B, also called Klp, is a motor for anterograde transport of mitochondria. It has a microtubule plus end-directed motility. Isoform 1 mediates the transport of synaptic vesicles in neuronal cells, while isoform 2 is required for induction of neuronal apoptosis. KIF1C is a new kinesin-like protein involved in vesicle transport from the Golgi apparatus to the endoplasmic reticulum. It has a microtubule plus end-directed motility. The FHA domain is a small phosphopeptide recognition module, but this group may lack the conserved residues that are required for binding phosphothreonine. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",